Solar cycle 25

Solar cycle 25 is the upcoming and 25th solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] It is expected to begin in late 2019 and continue through 2030.[3][4] However, the sun is showing signs of a reverse magnetic polarity sunspot appearing and beginning this solar cycle.[5] Indeed, the first Cycle 25 sunspot may already have appeared in early April 2018.[6]

There has been speculation about the start date of solar cycle 25.[7] However, authoritative organizations such as the International Solar Energy Society and NOAA's Space Weather Prediction Center have not yet issued or endorsed a scientific forecast for the cycle.

References

  1. ↑ Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401.
  2. ↑ "The Sun: Did You Say the Sun Has Spots?". Space Today Online. Retrieved 12 August 2010.
  3. ↑ Odenwald, Sten (2016-09-02). "Waiting For The Next Sunspot Cycle: 2019-2030". The Huffington Post. Retrieved 2017-11-22.
  4. ↑ McIntosh, Scott W.; Wang, Xin; Leamon, Robert J.; Davey, Alisdair R.; Howe, Rachel (2014-08-08). "Deciphering Solar Magnetic Activity: On the relationship between the sunspot cycle and the evolution of small magnetic features". The Astrophysical Journal. 792 (1). arXiv:1403.3071. Bibcode:2014ApJ...792...12M. doi:10.1088/0004-637X/792/1/12. Retrieved 2017-11-22.
  5. ↑ "Coronal hole faces Earth". SpaceWeatherLive.com. Retrieved 2018-04-24.
  6. ↑ "Cycle 25 observations in SDO HMI imagery". Retrieved 2018-05-04.
  7. ↑ "Forecast for Solar Cycle 25". Watts Up With That. Retrieved 16 April 2018.
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